苏州混凝土水泥制品研究院有限公司

头部文案

发布时间:2020-01-06 00:00:00
全国建材科技期刊
全国中文核心期刊
中国科技论文统计源期刊
万方数据-数字化期刊群入网期刊
中国学术期刊(光盘版)全文收录期刊
华东地区优秀科技期刊
江苏省期刊方阵“双效期刊”
中国期刊网全文收录期刊
中国科技期刊数据库全文收录期刊

杂志简介

主办单位: 苏州混凝土水泥制品研究院有限公司
中国混凝土与水泥制品协会
  • 主编 : 李建华
  • 常务副主编 : 王春蓉
  • 刊期 : 月刊
  • 电话 : 0512-68285716
  • E-mail : sccpitg@126.com
  • 国内统一刊号(CN) : 32-1173/TU
  • 国际标准刊号(ISSN) : 1000-4637
  • 邮发代号 : 28-80
hunnitu 微信公众号
hunnitu 扫码订购杂志

混凝土研究

泵送混凝土的工作性变化及应对方案研究
泵送混凝土的工作性变化及应对方案研究
  • 刘 洋1,王 倩2,张露瑶2,王晓英1,付海平1,张新民1
2020年第10期
摘要
引用本文
摘   要:从压力、温度、含气量、气泡聚并等角度研究了泵送条件下混凝土工作性变差的原因,提出了相应的解决方案。研究结果表明:在有效减水剂不足的情况下,泵压力可促使浆体发生稠化;含气量损失不是混凝土经泵稠化的原因;气泡排液和聚并会使混凝土经泵稀化;在缓释型聚羧酸减水剂掺量较高的情况下,经泵温升可促使浆体发生稀化;通过调整减水剂组分和掺量可有效缓解泵送条件下混凝土流动性变差的问题。 Abstract: The relative influence factors of changes in fluidity of concrete induced by pumping were studied. Some countermeasures were provided by concrete admixture adjustment. The results show that the pumping pressure accelerates the fluidity loss of the fresh paste containing insufficient dosage of superplasticizer. Air content loss is not the influential fator of pumping-thicking. Bubble coalescence promotes pumping-thinning. Temperature-rise can bring pumping-thinning in concrete containing sufficient dosage of superplasticizer with slump retention capacity. The adverse effects of pumping-thinning or pumping-thicking can be avoided by adjustment of concrete pumping agent.
刘洋,王倩,张露瑶.泵送混凝土的工作性变化及应对方案研究[J].混凝土与水泥制品,2020(10):31-36. LIU Y,WANG Q,ZHANG L Y,Study on the Workability Changes of Pumping Concrete and Its Countermeasures[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):31-36.
扰动对混凝土抗氯离子渗透性能的影响研究
扰动对混凝土抗氯离子渗透性能的影响研究
  • 谢德擎1,2,穆 松1,2,刘建忠1,2,石 亮3,刘 凯1,2,刘光严1,2
2020年第10期
摘要
引用本文
摘   要:利用改造后的击顶式振筛机提供三维扰动,通过线切割内部偏心顶轴,使竖向振幅接近南京长江大桥公路桥桥面的实际振幅;配制C30、C50普通混凝土和掺抗扰动剂的C50混凝土,设计7种扰动制度,研究了各扰动制度对混凝土抗氯离子渗透性能(RCM)的影响。研究结果表明:C30混凝土终凝前1 h受扰动,上部试块RCM值增幅最大,增幅为70.4%;C50混凝土终凝时受扰动,上部试块RCM值增幅最大,增幅为95%;该阶段混凝土的可塑性基本消失,受扰动后局部密实度降低,RCM值增大明显。掺入抗扰动剂可以实现混凝土“初期增稠”与“早期增强”,大幅提升普通混凝土的整体抗扰动性能,相比于自身未扰动组,受各扰动制度后RCM值几乎没有降低。 Abstract: Using the modified test-sieving machine to provide three-dimensional disturbance, the vibration amplitudes were close to the actual amplitudes of the road bridge deck of Nanjing Yangtze river bridge by cutting the internal eccentric top shaft. Seven disturbance systems were designed to study the influence on rapid chloride ions migration coefficient (RCM) of C30、C50 ordinary concrete and C50 anti-disturbance concrete. The study results show that when C30 ordinary concrete is disturbed at 1 h before the final setting, the RCM value of upper block increases the most with an increase by 70.4%. When C50 ordinary concrete is disturbed at the final setting, the RCM value of the upper block increases the most, by 95%. At these stage, the plasticity of concrete basically disappears, leading to a decrease in compactness and a significant increase in RCM value. Adding disturbance resistance agent, the concrete can achieve       "initial thickening" and "early strengthening", and improve the overall anti-disturbance performance. The RCM values before and after disturbance are almost the same.
谢德擎,穆松,刘建忠,等.扰动对混凝土抗氯离子渗透性能的影响研究[J].混凝土与水泥制品,2020(10):27-30. XIE D Q,MU S,LIU J Z.Research on the Chloride Migration Coefficient Evolution of Concrete After Being Disturbed[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):27-30.
混凝土成熟度理论研究与应用现状综述
混凝土成熟度理论研究与应用现状综述
  • 朱 然1,2,徐 俊1,2,占羿箭1,2
2020年第10期
摘要
引用本文
摘   要:回顾了混凝土成熟度理论的发展历程;梳理了国内外混凝土成熟度与混凝土强度之间相关的数学模型,并探讨了各模型的适用范围;最后概述了当前混凝土成熟度理论的应用现状。 Abstract: The development history of concrete maturity theory is reviewed. The mathematical models related to concrete maturity and concrete strength at home and abroad are enumerated, and the applicable scope of each model is discussed. In addition, the current applications of concrete maturity theory are summarized.  
朱然,徐俊,占羿箭.混凝土成熟度理论研究与应用现状综述[J].混凝土与水泥制品,2020(10):21-26. ZHU R,XU J,ZHAN Y J.Review on the Research and Application of Concrete Maturity Theory[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):21-26.
混凝土抗侵蚀防腐剂抗蚀系数试验方法研究
混凝土抗侵蚀防腐剂抗蚀系数试验方法研究
  • 刘 立1,丁小富2,李长成1,郑永辉1,贾福杰1,赵顺增1,吴 勇1
2020年第10期
摘要
引用本文
摘   要:以40 mm×40 mm×160 mm试件替代10 mm×10 mm×60 mm试件(A法),建立了混凝土抗侵蚀防腐剂抗蚀系数试验方法(B法)。保持养护及腐蚀制度不变,按灰砂比1∶6,流动度(250±5)mm确定了水胶比,使侵蚀溶液浓度提高至15%,分别测试20 ℃侵蚀溶液中和水中90 d砂浆试件的抗压强度,以抗压强度比确定90 d抗蚀系数。结果表明:B法的90 d抗蚀系数与原A法的28 d抗蚀系数结果相吻合,B法是可行的。 Abstract: The corrosion resistance coefficient test method B for environmental corrosion-resistance admixture was established. The traditional 10 mm×10 mm×60 mm specimen (test method A) was replaced by 40 mm×40 mm×160 mm mortar specimen, while the curing and corrosion system remained unchanged, water-cement ratio was determined according to the mortar fluidity of (250±5)mm and the cement-sand ratio was 1∶6. The concentration of corrosion solution was increased to 15%. The compressive strength of mortar in corrosion solution and mortar in water at 20 ℃ for 90 d were tested, respectively. And the corrosion resistance coefficient at 90 d was determined by the compressive strength ratio. The results show that the corrosion resistance coefficient at 90 d of method B is consistent with the corrosion resistance coefficient at 28 d of the original method A. Therefore, test method B is feasible.
刘立,丁小富,李长成,等.混凝土抗侵蚀防腐剂抗蚀系数试验方法研究[J].混凝土与水泥制品,2020(10):17-20. LIU L,DING X F,LI C C,et al.Study on the Corrosion Resistance Coefficient Test Method for Environmental Corrosion-resistance Admixture[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):17-20.
矿物掺合料对高性能混凝土耐久性的影响
矿物掺合料对高性能混凝土耐久性的影响
  • 田 帅1,2,吕剑锋1,李世华1,2,王俊杰1,王模弼1
2020年第10期
摘要
引用本文
摘   要:研究了粉煤灰、矿渣粉的不同掺入方式对高性能混凝土(HPC)抗氯离子渗透性能及抗冻性能的影响。结果表明:在相同水胶比条件下,随着矿物掺合料掺量的增加,HPC的抗压强度逐渐降低;掺入适量的矿物掺合料可有效降低HPC的电通量,改善抗氯离子渗透性能;当矿物掺合料掺量为40%,且粉煤灰和矿渣粉质量复掺比例为3∶1时,HPC在28 d与84 d的电通量分别为641.6 C和380.5 C;在水胶比及含气量不变的情况下,随着矿物掺合料掺量的增加,HPC的抗冻性能逐渐变差,而未掺矿物掺合料的HPC抗冻性能最好,抗冻等级为F200。  Abstract: The effect of different mixing methods of fly ash and slag powder on the anti-chloride ion permeability and frost resistance of high performance concrete (HPC) were studied. The results show that the compressive strength of HPC decreases with the increase of mineral admixture when the water-binder ratio and air content are unchanged. The appropriate amount of mineral admixture can effectively reduce the electrical flux of HPC. And the resistance of HPC to chloride ion penetration is improved. When the content of mineral admixture is 40% and m(fly ash)∶m(slag powder) is 3∶1, the electric flux of concrete at the 28 d and 84 d is 641.6 C and 380.5 C respectively. With the addition of mineral admixtures, the frost resistance of concrete gradually deteriorates. The antifreeze performance of HPC without mineral admixture is the best, and the antifreeze grade is F200.   
田帅,吕剑锋,李世华,等.矿物掺合料对高性能混凝土耐久性的影响[J].混凝土与水泥制品,2020(10):12-16. TIAN S,LYU J F,LI S H,et al.The Effect of Mineral Admixtures on the Durability Performance of High Performance Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):12-16.
超高强混凝土降黏型超支化聚羧酸减水剂的应用研究
超高强混凝土降黏型超支化聚羧酸减水剂的应用研究
  • 王方刚1,2,陆加越1,2,杨 勇1,2,林 玮1,2,刘建忠1,2,龚志炜3
2020年第10期
摘要
引用本文
摘   要:通过净浆流动度、流变特性、吸附行为对自研发的减水剂进行了评价,优选出了降黏型超支化聚羧酸减水剂(PCE)。结果表明:同掺量时,超支化PCE-2、PCE-3的流动度大于梳状PCE-1;随着时间的延长,PCE-1流动度逐渐降低,而PCE-2和PCE-3的流动度在60 min内不损失,且略有提升;相同剪切速率下PCE-2和PCE-3的剪切应力和黏度均明显低于PCE-1,PCE-1存在剪切变稠现象,尤其是低水灰比(0.2)时剪切变稠现象更明显;PCE-2和PCE-3的吸附量远高于PCE-1,低水灰比(0.2)时PCE-1的吸附量与PCE-2和PCE-3的差距变小,但PCE-1在20 min后吸附量增长缓慢,明显低于PCE-2和PCE-3。降黏型超支化聚羧酸减水剂在实际工程应用中效果较好。 Abstract: The degree of paste fluidity, rheological behavior, and adsorption performance tests were used to evaluate the dispersion properties of PCE, and a viscosity reducing hyperbranched polycarboxylate superplasticizer was selected. The results show that the fluidity of hyperbranched PCE-2 and PCE-3 is greater than that of comb-like PCE-1 when the dosage is mixed, and the fluidity of PCE-1 decreases gradually with time, while the fluidity of PCE-2 and PCE-3 won′t lose within 60 min and increases slightly. At the same shear rate, the shear stress and viscosity of PCE-2 and PCE-3 are significantly lower than that of PCE-1, and PCE-1 has the phenomenon of shear thickening, especially at a low water-cement ratio(0.2). The adsorption capacity of PCE-2 and PCE-3 is much higher than that of PCE-1, and the difference between the adsorption capacity of PCE-1 and that of PCE-2 and PCE-3 is smaller at low water-cement ratio(0.2), and the adsorption capacity of PCE-1 increases very slowly after 20 min, which is significantly lower than that of PCE-2 and PCE-3. Viscosity reducing hyperbranched polycarboxylate superplasticizer has been successfully applied in actual engineering project.
王方刚,陆加越,杨勇,等.超高强混凝土降黏型超支化聚羧酸减水剂的应用研究[J].混凝土与水泥制品,2020(10):8-11,16. WANG F G,LU J Y,YANG Y,etal.Study on the Application of Viscosity Reducing Hyperbranched Polycarboxylate Superplasticizer for UHSC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):8-11,16.
微生物诱导沉积碳酸钙机理及其在混凝土裂缝修复中的应用
微生物诱导沉积碳酸钙机理及其在混凝土裂缝修复中的应用
  • 代光志,徐潇航,丁 聪
2020年第10期
摘要
引用本文
摘   要:对光合生物诱导沉积、硫酸盐还原菌诱导沉积、氮循环菌诱导沉积等微生物诱导沉积碳酸钙(MICP)机制进行了回顾,分别阐述了不同机制的作用机理,并探讨了不同机制在混凝土裂缝修复中的应用研究进展。此外,还分析了目前MICP修复技术存在的问题和局限性,对未来的进一步研究提出了思路和建议。 Abstract: An overview of the main mechanisms of microbial induced carbonate precipitation(MICP) is offered, such as photosynthetic organism-induced deposition, sulfate-reducing bacteria-induced deposition, and nitrogen cycle bacteria-induced deposition. The latest research on application of different mechanisms in repairing concrete cracks is reviewed respectively. Furthermore, current problems and limitations of MICP technology are analyzed, and insights and suggestions for further research are put forward. 
代光志,徐潇航,丁聪.微生物诱导沉积碳酸钙机理及其在混凝土裂缝修复中的应用[J].混凝土与水泥制品,2020(10):1-7. DAI G Z,XU X H,DING C.Review of Mechanism of Microbial Induced Carbonate Precipitation and Its Application in Healing Concrete Cracks[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):1-7.

水泥混凝土制品

BFRP筋/钢筋混合配筋混凝土梁抗弯试验与有限元分析
BFRP筋/钢筋混合配筋混凝土梁抗弯试验与有限元分析
  • 付 莹1,孔祥清2,于 洋2,高红军3
2020年第10期
摘要
引用本文
摘   要:通过抗弯性能试验,分析了玄武岩纤维增强筋(BFRP筋)/钢筋混合配筋混凝土梁的承载力、破坏形态、挠度及裂缝发展情况。在试验基础上利用ANSYS软件建立了BFRP筋/钢筋混合配筋混凝土梁的三维有限元数值分析模型,并与试验结果进行了对比。在数值分析模型基础上研究了FRP筋类型及其布置方式对混合配筋混凝土梁抗弯性能的影响。结果表明:BFRP筋/钢筋混合配筋混凝土梁的破坏形式均为钢筋屈服后受压区混凝土被压碎;配筋面积比Af /As越大,初裂荷载越小,裂缝总数越少,挠度逐渐增加;建立的数值分析模型能较准确地模拟BFRP筋/钢筋混合配筋混凝土梁的抗弯性能;BFRP筋、AFRP筋(芳纶纤维增强筋)及GFRP筋(玻璃纤维增强筋)与钢筋混合配筋混凝土梁的荷载-挠度曲线比较接近;与BFRP筋相比,CFRP筋(碳纤维增强筋)/钢筋混合配筋混凝土梁的开裂荷载和极限荷载分别高14.2%和9.3%,最大挠度小35%左右;BFRP筋的布置方式(单层或双层)对混合配筋混凝土梁抗弯性能的影响不大。 Abstract: Through flexural test, the flexural capacity, failure mode, flexibility deformation and crack distribution of basalt fiber reinforced bars (BFRP bars) and steel hybrid reinforced concrete beams were analyzed. Based on the test datas, a 3D finite element model of BFRP bars/steel hybrid reinforced concrete beams was established by using ANSYS software, and compared with the experimental results. Based on the numerical analysis model, the influence of FRP bar types and their arrangement on flexural performance of hybrid reinforced concrete beams was studied. The results show that the failure mode of BFRP bars/steel hybrid reinforced concrete beams is that the concrete in the compression zone is crushed after the steel bars yield. The larger the Af /As, the smaller the initial crack load, the smaller the total number of cracks, and the deflection is increased gradually. The established numerical analysis model can more accurately simulate the flexural performance of BFRP bars/steel hybrid reinforced concrete beams. The load-deflection curves of BFRP bars, AFRP bars, and GFRP bars and steel hybrid reinforced concrete beams are close. Compared with BFRP bars, the cracking load and ultimate load of CFRP bars/rebar hybrid reinforced concrete beams are 14.2% and 9.3% higher, respectively, and the maximum deflection is about 35% smaller. The arrangement of BFRP bars (single layer or double layer) has little effect on the flexural performance of hybrid reinforced concrete beams.
付莹,孔祥清,于洋,等.BFRP筋/钢筋混合配筋混凝土梁抗弯试验与有限元分析[J].混凝土与水泥制品,2020(10):45-50. FU Y,KONG X Q,YU Y,et al.Flexural Test and Finite Element Analysis of BFRP Bars/steel Hybrid Reinforced Concrete Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):45-50.
预制装配化舱格式挡墙设计及应用研究
预制装配化舱格式挡墙设计及应用研究
  • 李昊煜1,2,赵华宏1,2,董 阁1,2
2020年第10期
摘要
引用本文
摘  要:为简化施工工序、节省劳动力、提高工程质量,基于拓扑优化理论,设计了预制装配化舱格式挡墙的结构形式,运用有限元仿真分析软件,优化了连接细节。最后结合具体工程应用,分析了预制装配化舱格式挡墙在经济性、环保等方面存在的优势,可为其推广应用提供参考。 Abstract: In order to simplify the construction process, reduce the labor force and improve the engineering quality, based on the topology optimization theory, the structural form of prefabricated chanberd retaining wall is designed, and the connection details are optimized by using the finite element simulation analysis software. Finally, combined with the specific engineering application, the advantages of prefabricated prefabricated cabin retaining wall in economy and environmental protection are analyzed, which provides a reference for its popularization and application.
李昊煜,赵华宏,董阁.预制装配化舱格式挡墙设计及应用研究[J].混凝土与水泥制品,2020(10):42-44.,50 LI H Y,ZHAO H H,DONG G.Research on Design and Application of Prefabricated Chanberd Retaining Wall[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):42-44,50.
预制清水混凝土看台深化设计关键技术研究
预制清水混凝土看台深化设计关键技术研究
  • 李亚娟
2020年第10期
摘要
引用本文
摘   要:为达到预制清水看台整体效果要求,结合广东省亚青会体育场项目,进行了预制清水混凝土看台深化设计,研究了特殊部位连接构造、电气预留预埋技术和细部设计技术,实现了结构和电气设计一体化的目的,可为类似工程提供参考。 Abstract: In order to achieve the overall effect requirements of prefabricated fair-faced concrete stand, combined with the project of Guangdong Asian Youth Games Stadium, the in-depth design of precast fair faced concrete stands was carried out, and the connection structure of special parts, electrical reservation and embedding technology and detail design technology were studied. The integration of structural and electrical design are designed, which can provide a reference for the similar projects.
李亚娟.预制清水混凝土看台深化设计关键技术研究[J].混凝土与水泥制品,2020(10):37-41. LI Y J.Research on Key Technology of Deepening Design of Precast Fair-faced Concrete Stand[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):37-41.

纤维水泥及制品

高温后玄武岩纤维混凝土力学性能试验研究
高温后玄武岩纤维混凝土力学性能试验研究
  • 李 曈1,张晓东1,刘华新1,陈 明2,范锦泽1,陈 晨1
2020年第10期
摘要
引用本文
摘   要:研究了高温作用下素混凝土、玄武岩纤维混凝土、玄武岩-高吸水树脂混凝土及玄武岩-纤维素混杂纤维混凝土的力学性能,建立了高温作用后混凝土的抗压强度预测模型。结果表明:纤维的掺入能够提高混凝土的耐高温性能;对于抗压强度,玄武岩-纤维素混杂纤维混凝土的抗压强度值最高,400 ℃时,其抗压强度相较素混凝土提高了36.3%;对于抗折强度,玄武岩和高吸水树脂混掺对混凝土抗折强度的提升效果最优;建立的高温作用下混凝土抗压强度预测模型的精度较高。 Abstract: The mechanical properties of plain concrete, basalt fiber concrete, basalt-superabsorbent resin concrete and basalt-cellulose hybrid fiber concrete after high temperature were studied, and the prediction models of compressive strength of concrete after high temperature were established. The results show that the addition of fiber can effectively improve the high temperature resistance of concrete. For compressive strength, the basalt-cellulose hybrid fiber concrete has the highest compressive strength, and at 400 ℃, its compressive strength is 36.3% higher than that of plain concrete. For flexural strength, the mixing of basalt and superabsorbent resin has the best effect on the improvement of the flexural strength of concrete. The established prediction models of compressive strength of concrete under high temperature have high accuracy.
李曈,张晓东,刘华新,等.高温后玄武岩纤维混凝土力学性能试验研究[J].混凝土与水泥制品,2020(10):61-64. LI T,ZHANG X D,LIU H X,et al.Experimental Study on Mechanical Properties of Basalt Fiber Concrete After High Temperature[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):61-64.
RPC本构关系及矩形RPC梁抗弯承载力研究
RPC本构关系及矩形RPC梁抗弯承载力研究
  • 龙佩恒,黄琳艺,乔 宏,宋 浩,李 飞
2020年第10期
摘要
引用本文
摘   要:设计了3组不同配比活性粉末混凝土(RPC)试件,研究了钢纤维对RPC试件力学性能的影响,分析了RPC抗压本构关系,并提出了新的RPC抗拉本构方程。在此基础上设计了矩形梁抗弯承载力试验,研究了钢纤维对RPC梁的延性、韧性、承载力和抗裂性能的影响。结果表明:掺钢纤维RPC梁的开裂荷载、屈服荷载及极限承载力较未掺钢纤维RPC梁均提升了20%以上,构件的裂缝宽度能够控制在0.1 mm以内。 Abstract: 3 groups of reactive powder concrete(RPC) specimens with different mix proportions were designed, the influence of steel fiber on the mechanical properties of RPC specimens was studied, the compressive constitutive relationship of RPC was analyzed, and a new RPC tensile constitutive equation was put forward. On this basis, a rectangular beam flexural bearing capacity test was designed, and the influence of steel fiber on the ductility, toughness, bearing capacity and anti-cracking performance of RPC beams was studied. The results show that the crack load、 yield load and ultimate flexural capacity of RPC beams with steel fiber are increased by more than 20% compared with RPC beams without steel fiber, and the crack width of the members can be controlled to less than 0.1 mm.
龙佩恒,黄琳艺,乔宏,等.RPC本构关系及矩形RPC梁抗弯承载力研究[J].混凝土与水泥制品,2020(10):55-60. LONG P H,HUANG L Y,QIAO H,et al.RPC Constitutive Relation and Ultimate Flexural Capacity of Rectangular RPC Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):55-60.
超高强钢筋ECC柱轴心受压试验研究
超高强钢筋ECC柱轴心受压试验研究
  • 汪知文1,李碧雄1,游 杨1,廖 桥1,饶 丹2,余 弦2
2020年第10期
摘要
引用本文
摘   要:对超高强钢筋HRB500与高延性水泥基复合材料(ECC)矩形截面短柱进行了轴心受压试验,研究了配筋率为1.13%、2.26%的超高强钢筋对ECC应力-应变曲线的影响。结果表明:ECC柱在破坏后依然能保持良好的整体性,且裂缝宽度明显低于普通混凝土柱;超高强钢筋ECC柱的纵向钢筋均达到屈服强度,极限承载力和极限竖向应变均大于普通混凝土试件;超高强钢筋与ECC混凝土之间的协同性明显优于普通混凝土;ECC柱的泊松比随着加载的进行先逐渐变小,然后有一定程度的增加。 Abstract: The axial compression test of HRB500 and ECC rectangular section short column was carried out, and the effect of HRB500 with reinforcement ratio of 1.13% and 2.26% on the stress-strain curve of ECC column was studied. The results show that the ECC column can still maintain good integrity after failure, and the crack width is obviously lower than that of ordinary concrete column. The longitudinal reinforcement of ultra-high strength steel bar ECC column can reach yield strength, and the ultimate bearing capacity and ultimate vertical strain of ECC column are larger than those of ordinary concrete column. The synergy between ultra-high strength steel bar and ECC concrete is obviously better than that of ordinary concrete. The Poisson′s ratio of ECC column gradually decreases as the loading progresses, and then increases to some extent.
汪知文,李碧雄,游杨,等.超高强钢筋ECC柱轴心受压试验研究[J].混凝土与水泥制品,2020(10):51-54. WANG Z W,LI B X,YOU Y,et al.Experimental Study on Axial Compression of ECC Columns with Ultra-high Strength Reinforced Steel[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):51-54.

房建材料及制品

新旧混凝土叠合面抗剪性能研究
新旧混凝土叠合面抗剪性能研究
  • 陈甫亮1,胥 卉2,廖桢颖1,王韶纤2,李俊杰1,陈 俊2
2020年第10期
摘要
引用本文
摘   要:新旧混凝土叠合面的剪切强度是衡量界面黏结性能的最重要指标。基于Z形黏结试件剪切试验,研究了不同叠合层材料、不同界面处理方式、不同槽口形式下的叠合界面抗剪性能。结果表明,UHPC试件表现出较好的界面抗剪能力,其承载力均高于自密实试件。对于槽口构件,槽口连接形式能提高叠合面抗剪承载力,其中梯形槽口对界面抗剪承载力提升效果更为显著。槽口形式对UHPC材料与C30混凝土界面抗剪能力的影响相较于其对自密实材料与C30混凝土界面抗剪能力的影响更为显著。对于有锚固钢筋的试件,增大锚固钢筋的锚固长度可以提高UHPC材料与C30混凝土界面抗剪能力;对于无锚固钢筋无槽口试件,气泡纸粗糙面处理可以改善UHPC试件的变形能力。 Abstract: The shear strength of old and new concrete combined interface is the most important index to measure the interfacial bonding property. Based on the shear test of z-shaped bonding specimens, the shear resistance of composite interface with different laminated materials, different interface treatment methods and different notches was studied. The results show that the UHPC specimens exhibit good interface shear resistance and their bearing capacity is higher than that of self-compacting specimens. For the notched specimens, the notched joint can improve the shear strength of the composite surface, among which the trapezoidal notched joint has more significant effect on the shear strength of the interface. The influence of notch form on the shear resistance of UHPC material and C30 concrete interface is more significant than that of self-compacting material and C30 concrete interface. For the specimens with anchorage reinforcement, increasing the anchorage length of the anchorage reinforcement can improve the shear resistance of the interface between UHPC material and C30 concrete. For non-anchorage steel bar notched specimens, bubble paper rough surface treatment can improve the deformation capacity of UHPC specimens.
陈甫亮,胥卉,廖桢颖,等.新旧混凝土叠合面抗剪性能研究[J].混凝土与水泥制品,2020(10):75-79. CHEN F L,XU H,LIAO Z Y,et al.Research on the Shear Resistance of Combined Interface of New and Old Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):75-79.
灰缝厚度对蒸压加气混凝土砌块墙体热工性能的影响
灰缝厚度对蒸压加气混凝土砌块墙体热工性能的影响
  • 肖力光,邢纹浩
2020年第10期
摘要
引用本文
摘   要:基于Ansys Workbench热力学模块对蒸压加气混凝土外墙传热模式进行了分析,并对研究单元进行建模,确定了模型边界条件及荷载加载形式。通过对3 mm、20 mm等不同厚度砌筑灰缝进行建模研究,探讨了不同灰缝厚度情况下,蒸压加气混凝土砌块墙体温度的分布情况。结果表明,薄灰缝砌筑可以显著减少蒸压加气混凝土砌块墙体的“微热桥效应”,从而降低墙体热量流失。灰缝散失的热量占墙体总散失热量百分比y与灰缝厚度x的关系为:y=0.946x+3.247。 Abstract: Based on the thermodynamics module of Ansys Workbench, the heat transfer mode of the outer wall of autoclaved aerated concrete was analyzed, and the research unit was modeled to determine the boundary conditions of the model and the form of load loading. Through the modeling study of masonry mortar joints with different thickness such as 3 mm and 20 mm, the temperature distribution of autoclaved aerated concrete block walls with different thickness of mortar joints was discussed. The results show that the thin mortar joint masonry mortar plays a positive role in reducing the "micro-thermal bridge effect" of autoclaved aerated concrete block wall and reducing the heat loss of wall. The relationship between the ratio of heat loss from ash joints to total heat loss from wall(y) and the thickness of mortar joints (x) is y=0.946x+3.247.
肖力光,邢纹浩.灰缝厚度对蒸压加气混凝土砌块墙体热工性能的影响[J].混凝土与水泥制品,2020(10):72-74,79. XIAO L G,XING W H.Effect of Different Thickness Mortar Joints on Thermal Performance of Autoclaved Aerated Concrete Block Wall[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):72-74,79.
预制夹心混凝土墙板热工性能研究
预制夹心混凝土墙板热工性能研究
  • 张佳阳,路国忠,郭振雷,尹志芳
2020年第10期
摘要
引用本文
摘   要:通过研究不同种类及厚度的夹心保温材料、拉结件布置数量及保温板缝隙宽度,分析了其对预制夹心混凝土墙板传热系数的影响。结果表明:夹心层保温材料导热系数越小、夹心层越厚,预制夹心混凝土墙板传热系数越小;非金属拉结件对夹心墙板传热系数的影响约为1.3%~3.2%,夹心层厚度越厚,墙板传热系数越小,拉结件影响越大;夹心层保温板采用定制式保温板可有效降低保温板缝隙对预制墙板传热系数的影响,计算结果可为预制夹心墙板的热工设计提供依据。 Abstract: By studying the sandwich insulation layer of different types and thicknesses, the number of connectors and the gaps of insulation boards, the effects of the heat transfer coefficient on prefabricated concrete sandwich wallboard were analyzed. The results show that the lower thermal conductivity and the thicker the sandwich insulation layer, the smaller the heat transfer coefficient of prefabricated concrete sandwich wallboard. The effect of non-metallic connectors on the heat transfer coefficient of the sandwich wallboard is about 1.3%~3.2%, and the thicker sandwich insulation layer, the samller the heat transfer coefficient of the sandwich wallboard, and the greater the influence of connectors. Customized sandwich wallboard, which can effectively reduce the effect of insulation board gap on the heat transfer coefficient of prefabricated sandwich wallboard. The calculation results can provide an evidence for the thermal design of prefabricated sandwich wallboard.
张佳阳,路国忠,郭振雷,等.预制夹心混凝土墙板热工性能研究[J].混凝土与水泥制品,2020(10):69-71. ZHANG J Y,LU G Z,GUO Z L,et al.Study on Thermal Performance of Prefabricated Concrete Sandwich Wallboard[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):69-71.
高性能轻质混凝土复合外墙围护部品 研究与应用
高性能轻质混凝土复合外墙围护部品 研究与应用
  • 孙源泽1,蒋勤俭1,刘 昊2,吕丽萍2,黄清杰1
2020年第10期
摘要
引用本文
摘   要:装配式钢结构住宅建筑正逐渐成为我国装配式建筑的重要组成部分,其外墙围护部品很难同时满足轻质、防水、防火、耐久以及与门窗、保温集成一体等高性能要求,限制了其快速、高质量发展。为解决钢结构住宅外墙围护部品性能不高的问题,通过研究外墙围护部品的材料、墙板、配件以及建筑、结构设计等,研发了一种满足钢结构住宅高性能要求的轻质混凝土复合外墙围护部品,并成功应用到了相应的工程中。 Abstract: The prefabricated steel structure residential buildings are gradually becoming an important part of prefabricated buildings in China. However, it is difficult to meet all high requirements of lightweight, waterproofing, fire prevention, durability and integration with doors, windows and insulating layer, which limits the rapid and high-quality development of steel structure residential buildings. In order to solve the problems of low performance, through studying the materials, accessories, construction and structural design of external wall enclosure components, a new lightweight concrete composite exterior wall enclosure component that meets the high performance requirements of steel structure residential buildings is developed, and successfully applied to corresponding projects.
孙源泽,蒋勤俭,刘昊,等.高性能轻质混凝土复合外墙围护部品研究与应用[J].混凝土与水泥制品,2020(10):65-68. SUN Y Z,JIANG Q J,LIU H,et al.Research and Application of High Performance Lightweight Concrete Composite Exterior Wall Enclosure Components[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):65-68.

检测及试验方法研究

混凝土回弹仪(2.207J)分段率定计量研究
混凝土回弹仪(2.207J)分段率定计量研究
  • 魏超琪1,王 磊2,张 鹏1,赵庆航1,贺晶晶3
2020年第10期
摘要
引用本文
摘   要:研究了混凝土回弹仪钢砧率定值与其硬度及质量间的关系,确定了一款比较适合中型回弹仪用的轻型钢砧(率定值为40±1)。结果表明:该轻型钢砧可有效提升回弹仪检定周期内常用示值区间段回弹值的重复性、稳定性和准确性,同时,可确保回弹仪的使用过程处于标准状态,进而提高回弹法检测混凝土抗压强度的精度。 Abstract: Based on the study of the relationship between the setting value of steel anvil and its hardness and weight, a light steel anvil with the setting value of 40±1 was determined. The results show that the light steel anvil can effectively improve the repeatability, stability and accuracy of the rebound value of commonly used indication interval in the verification cycle of the rebound instrument. In addition, it can ensure that the use process of the rebound instrument is in a standard state, thereby improving the accuracy of the rebound method for testing the compressive strength of concrete.
魏超琪,王磊,张鹏,等.混凝土回弹仪(2.207J)分段率定计量研究[J].混凝土与水泥制品,2020(10):83-86. WEI C Q,WANG L,ZHANG P,et al.Research on the Section Calibration and Measurement of Concrete Rebound Instrument(2.207J)[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):83-86.
热重分析法在混凝土碳化深度检测中的应用
热重分析法在混凝土碳化深度检测中的应用
  • 李 蓓1,2,金南国2,田 野2,金贤玉2,李鑫燚1
2020年第10期
摘要
引用本文
摘   要:针对现有酚酞试剂法无法精确测定混凝土碳化程度的不足,基于热重法定量分析CaCO3含量的试验原理,利用TA-Q500热重分析仪在原材料相同的条件下对不同水灰比及龄期条件下的混凝土碳化深度进行了检测,并阐述了该方法的具体操作步骤。结果表明:与酚酞试剂法相比,热重分析法可以定量分析碳化混凝土中的Ca(OH)2 和CaCO3含量,具有快速、方便的特点,且受环境和人为因素的影响较小,测试结果相对稳定准确。 Abstract: In view of the phenolphthalein method cannot accurately measure the concrete carbonation degree, based on the experimental principle of quantitative analysis of CaCO3 content by thermogravimetric method, the carbonation depth of concrete under different water cement ratio and age conditions was tested by TA-Q500 thermogravimetry analyzer under the same raw materials, and the specific operation steps of the method were described. The results show that compared with the phenolphthalein reagent method, the thermogravimetry method can quantitatively analyze the content of Ca(OH)2 and CaCO3 in carbonated concrete, which has the characteristics of rapidity and convenience, and is less affected by the environment and human factors, and the test results are relatively stable and accurate.  
李蓓,金南国,田野,等.热重分析法在混凝土碳化深度检测中的应用[J].混凝土与水泥制品,2020(10):80-82,86. LI B,JIN N G,TIAN Y,et al.Application of Thermogravimetric Analysis Method in Detecting Carbonation Depth of Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):80-82,86.

节能与环保

珊瑚-水泥复合胶凝材料性能研究及微观分析
珊瑚-水泥复合胶凝材料性能研究及微观分析
  • 王卓蕾1,2,谢建斌1,3,刘思楠1,张文豪1,赵一锦1
2020年第10期
摘要
引用本文
摘   要:以10%、20%、30%的珊瑚粉等质量取代水泥制备珊瑚-水泥复合胶凝材料,研究了珊瑚粉对水泥胶凝材料标准稠度用水量、凝结时间、水化放热量、胶砂强度、电阻率和吸波性能的影响,并用XRD、SEM方法分析了珊瑚-水泥复合胶凝材料的物相和微观形貌。结果表明:珊瑚粉会使水泥胶凝材料的凝结时间延长,水化放热量减少,对标准稠度用水量影响不明显;珊瑚粉对水泥胶凝材料的力学性能不利,但仍能满足工程建设要求;掺入珊瑚粉后,试件的电阻率下降、导电性能增加、吸波性能降低;珊瑚-水泥复合胶凝材料的主要水化产物与水泥胶凝材料类似,没有新产物生成。 Abstract: Coral-cement composite cementitious materials were prepared by replacing cement with 10%, 20% and 30% coral powder. The effects of coral powder on water consumption of standard consistency, setting time, hydration heat, flexural strength and compressive strength, resistivity and wave absorbing performance of cement cementitious materials were studied. XRD and SEM were used to analyze the phase and microstructure of coral-cement composite cementitious materials.  The results show that coral powder prolongs the setting time of cement cementitious materials, reduces the hydration heat, and has no obvious influence on water consumption of standard consistency. Coral powder is unfavorable to the mechanical properties of cement cementitious materials, but it can still meet the needs of engineering construction. After adding coral powder, the resistivity of the specimens decreases, the conductivity increases, and the wave absorbing performance decreases. The main hydration products of coral-cement composite cementitious materials are similar to cement cementitious materials, without new products. 
王卓蕾,谢建斌,刘思楠,等.珊瑚-水泥复合胶凝材料性能研究及微观分析[J].混凝土与水泥制品,2020(10):87-90,95. WANG Z L,XIE J B,LIU S N,et al.Study on Properties and Microanalysis of Coral-cement Composite Cementitious Materials[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):87-90,95.
超硫酸盐水泥植生多孔混凝土性能试验研究
超硫酸盐水泥植生多孔混凝土性能试验研究
  • 黄 劲,秦节发,陈 超,石 华,谭建湘,任 政
2020年第10期
摘要
引用本文
摘   要:选用一种低碱度超硫酸盐水泥制备了多孔混凝土,研究了不同掺量脱硫石膏对多孔混凝土pH值和力学性能的影响,分析了狗牙根、高羊茅、早熟禾、黑麦草和白喜草在多孔混凝土中的植生情况。结果表明:当脱硫石膏掺量为15%~20%,P·O 52.5水泥掺量为5%时,多孔混凝土的抗压强度最高;水胶比为0.3时,多孔混凝土的施工性和力学性能最优;脱硫石膏、P·O 52.5水泥和水胶比对多孔混凝土的pH值影响较小。制备的多孔混凝土pH值较低,能够满足植物生长需求,其中,高羊茅和白喜草在多孔混凝土中的植生性能最佳。 Abstract: The super sulfate cement with low alkalinity was selected to prepare the eco-porous concrete, the effects of different content of desulfurization gypsum on the pH value and mechanical properties of eco-porous concrete were studied, and the planting performance of bermudagrass, tall fescue, kentucky bluegrass, ryegrass and bahia grass in eco-porous concrete was analyzed. The results show that the compressive strength of eco-porous concrete is the highest when the content of desulfurized gypsum is 15%~20% and the content of P·O 52.5 cement is 5%. When the water-binder ratio is 0.30, the workability and mechanical properties of eco-porous concrete are optimal. The content of desulfurized gypsum, P·O 52.5 cement and water-binder ratio have little influence on the pH value of eco-porous concrete. The prepared eco-porous concrete has a low pH value and can meet the needs of plant growth. Among them, tall fescue and bahia grass have the best planting performance in eco-porous concrete.
黄劲,秦节发,陈超,等.超硫酸盐水泥植生多孔混凝土性能试验研究[J].混凝土与水泥制品,2020(10):91-95. HUANG J,QIN J F,CHEN C,et al.Experimental Study on the Performance of Super Sulphated Cement Eco-porous Concrete[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):91-95.

书评

粉煤灰对混凝土耐久性的影响研究 ——评《粉煤灰混凝土的耐久性》
粉煤灰对混凝土耐久性的影响研究 ——评《粉煤灰混凝土的耐久性》
  • 孙红军
2020年第10期
摘要
引用本文
我国在建筑施工行业每年需要消耗大量的水泥,而生产水泥需要消耗大量的资源。粉煤灰是燃煤发电产生的废弃物,若不能充分利用,粉煤灰的堆积会带来环境污染。为了提高粉煤灰的利用率,解决上述资源与环境的难题,鲁丽华等人编著的《粉煤灰混凝土的耐久性》一书。笔者通过对该书的学习,认为该书从背景概述到试验研究,再到结论分析,从不同角度分析了在冻融循环、腐蚀环境下粉煤灰混凝土及粉煤灰钢筋混凝土构件各项性能的发展规律,现简要总结如下。
孙红军.粉煤灰对混凝土耐久性的影响研究——评《粉煤灰混凝土的耐久性》[J].混凝土与水泥制品,2020(10):96.

论文推荐

再生混凝土配合比设计初探
再生混凝土配合比设计初探
  • 张亚梅,秦鸿根,孙 伟,郝东明,宁 钟
2002年第2期
摘要
引用本文
摘 要:通过实验研究探索了再生混凝土配合比设计的方法, 提出了在普通混凝土配合比设计的基础上进行废混凝土骨料的预吸水, 并通过掺加优质粉煤灰、减水剂或二者复合, 可成功地配制同时满足工作性和强度要求的再生混凝土。 根据这种方法 , 配制的全部使用废混凝土骨料为粗骨料的再生混凝土28天的抗压强度高达54.6MPa。 Abstract: The approach for the proportion design of recycled aggregate concrete is investigated according to the experimental study.It is suggested that the proportion of cement, sand and aggregate can be calculated based on the current proportion design code for ordinary concrete.As regard to the water content, the water adsorption of waste concrete aggregate within certain time period should also be considered and added to the water content calculated according to the code for ordinary concrete .In addition, the using of good quality fly ash and superplasticizer can improve the strength of recycled aggregate concrete.The highest compressive strength of the concrete, in which all aggregate is insteaded by waste concrete aggregate, is up to 54.6MPa at 28days.
摘 要:通过实验研究探索了再生混凝土配合比设计的方法, 提出了在普通混凝土配合比设计的基础上进行废混凝土骨料的预吸水, 并通过掺加优质粉煤灰、减水剂或二者复合, 可成功地配制同时满足工作性和强度要求的再生混凝土。 根据这种方法 , 配制的全部使用废混凝土骨料为粗骨料的再生混凝土28天的抗压强度高达54.6MPa。 Abstract: The approach for the proportion design of recycled aggregate concrete is investigated according to the experimental study.It is suggested that the proportion of cement, sand and aggregate can be calculated based on the current proportion design code for ordinary concrete.As regard to the water content, the water adsorption of waste concrete aggregate within certain time period should also be considered and added to the water content calculated according to the code for ordinary concrete .In addition, the using of good quality fly ash and superplasticizer can improve the strength of recycled aggregate concrete.The highest compressive strength of the concrete, in which all aggregate is insteaded by waste concrete aggregate, is up to 54.6MPa at 28days.
高性能混凝土———绿色混凝土
高性能混凝土———绿色混凝土
  • 吴中伟
2000年第2期
摘要
引用本文
提要:21世纪水泥混凝土面临两大问题:(1)可持续发展问题;(2)可知性问题。本文以前者为主并论述高性能混凝土技术的要点。
绿色高性能混凝土 ———混凝土的发展方向
绿色高性能混凝土 ———混凝土的发展方向
  • 吴中伟
1998年第1期
摘要
引用本文
摘要:本文从合理利用资源,保护人类赖于生存的自然环境不遭破坏并实现可持续发展的战略高度出发,论述了混凝土目前及今后的发展方向,提出了发展“绿色高性能混凝土(GHPC)的观点。 Abstract :In this paper the trend of concrete development at present and future has been espounded with a far -sighted strategy , that is reasonably utilizing the resource , protecting the natural environment , which human existance relies on , and realizing the sustainable development .And a point of view for developing Green High Performance Concrete has been put forward .
200~300MPa 活性粉末混凝土(RPC)的配制技术研究
200~300MPa 活性粉末混凝土(RPC)的配制技术研究
  • 何 峰,黄政宇
2000年第4期
摘要
引用本文
摘 要:试验研究了原材料品种、 性质及配合比对 RPC 强度的影响;在未掺钢纤维的情况下, 配制出了流动性好, 高温养护(200℃)下抗压强度达 229.0MPa 的超高强混凝土, 在掺钢纤维以及高温养护的情况下 RPC 的抗压强度高达 298.6MPa。 Abstract:ased on experiments , the effects of kinds , properties and proportioning of raw materials on the compressive strength of RPC was studied.As a result, ultra high-strength concrete with excellent fluidity and compressive strength up to 229.0MPa under high temperature curing (200℃)was prepared , while the compressive strength of RPC adding with steel fiber was up to 298.6MPa.
纤维增强—水泥基材料的未来
纤维增强—水泥基材料的未来
  • 吴中伟
1999年第1期
摘要
引用本文
一 、大宗建材必须是可持续发展的绿色材料 水泥与水泥基材料是当今最大宗的人造材料 。世 界水泥年产量已超过 15 亿吨 (我国 1997 年为 5.1 亿 吨 ,达世界产量的三分之一), 据此推算 ,水泥基材料总 量在 60~ 70 亿吨上下 。估计所消耗的主要资源为优质 石灰石 15亿吨 、砂石集料 40 亿 m 3 , 排放的 CO 2(主要 温室气体)12亿吨以上 , 还有其他有害气体与大量粉 尘 ,严重污染环境 。如今后几年我国水泥年产量保持在 5亿吨 , 按合理的指标估算 , 每年消耗的能源 、资源与 造成的环境负担如表 1。 可见不论全世界与我国 ,都必须依靠科技 ,大力节 约能源资料 ,保护环境 ,否则水泥与水泥基材料将成为 不可持续发展的材料 。水泥基材料必须向高性能发展 , 向减少用量 , 延长寿命 , 增加功能 , 尤其降低环境代价 的方向努力 。
橡胶粉改性的高韧性混凝土研究
橡胶粉改性的高韧性混凝土研究
  • 宋少民,刘娟红,金树新
1997年第1期
摘要
引用本文
摘要 : 本文探讨了 橡胶粉对 混授土 抗折 、 抗压 强 度及抗冲击性 能的影响 。 研 究结 果表明橡胶 粉改性 混 凝土的抗折 、 抗压 强 度 较基准混 凝土 变化不 大 , 冲击荷载则 明 显提 高 。 采用 适当 粘结剂可 以 改善橡胶粉与混 授 土的界面状况 , 大幅度提高混凝土 的抗 冲击性能 。 Abstract: In this paper, the influence of rubber powder on flexural, compr回sive and impact strength of c。ncrete has been studied. The r田ults show that, in comparison with the control, there is lttle diifference to flexural and com pressive strength of the modifiied c。ncrete. H。wever, the impact property w出improved 。bviosly. Further more by using suitable adhesion agent, the interface state between rubber and conorete oan be improved, which greatly benefits the impact property of concrete.
再生混凝土集料的研究
再生混凝土集料的研究
  • 王武祥,刘立,尚礼忠,王玲
2001年第4期
摘要
引用本文
摘要:再生集料作为废弃混凝土的主要用途, 其性能及对混凝土的性能影响程度将决定废弃混凝土的再生利用可能, 本文进行了这方面的探索性研究。
高性能减水剂的研究现状与展望
高性能减水剂的研究现状与展望
  • 李崇智,冯乃谦,李永德,覃维祖
2001年第2期
摘要
引用本文
摘 要:本文概述了国内外高性能减水剂的主要性能及发展现状, 介绍了高性能减水剂的种类与组成, 提出了有关高性能减水剂的研究内容及今后研究方向。 Abstract:In this paper, the main properties and the present development condition of the high performance water -reducing agent in the world have been summarized, then the composites of various type and something about the research contents and trends have been proposed.
混凝土渗透性与微观结构关系的研究
混凝土渗透性与微观结构关系的研究
  • 李淑进 1, 赵铁军 2, 吴科如 1
2004年第2期
摘要
引用本文
摘 要:根据混凝土的渗透性大小与其孔结构参数直接相关的观点, 采用压汞试验测定了水化 60d的水泥浆体孔结构和孔分布情况, 并采用扫描电镜研究了混凝土的微观结构与形貌。结果表明, 水胶比对混凝土的总孔隙率和孔径分布的影响都很大;掺入20%的粉煤灰的混凝土的累积孔隙体积率有所减少, 孔径分布偏向于凝胶孔, 且其微观结构均匀密实, Ca(OH)2 的晶粒含量较少。混凝土微观结构的改善有效地降低了其渗透性。 Abstract:t is directed for correlationship between the permeability and the microstructure parameter of concrete.The porosity and diameter distribution of pores of 60d aged cement mortar are investigated by MIP, and the microstructure of concrete is observed by SEM.The results shows that the water cement ratio largely effects the total pore volume and the diameter distribution and, when added with fly ash by weight of 20%cement content, the total pore volume is decreased.
3D打印混凝土技术在新冠肺炎防疫方舱中的应用
3D打印混凝土技术在新冠肺炎防疫方舱中的应用
  • 王香港1,2,王 申2,贾鲁涛2,李 进2,3,刘培善2,3,潘金龙1,2,张亚梅1,2
2020年第4期
摘要
引用本文
摘   要:以南京市江北新区防疫测控方舱为工程案例,展示了建筑3D打印技术在应对新冠肺炎疫情及类似紧急公共事件中的应用方式,探讨了3D打印技术的优势和未来的发展趋势。实践表明,建筑3D打印技术在防疫阶段具有较大的优势。利用3D打印技术进行防疫测控方舱的建造,其建造工艺简洁,生产周期短,安装便捷。构件打印过程由计算机自动控制,人工干预少,且构件以单元模块进行打印,安装用工少。目前,该类型的防疫方舱已经在南京、雄安、海门、濮州等地投入使用。 Abstract: Taking the epidemic prevention cabins at Jiangbei New Area of Nanjing as an engineering case, the application of 3D printing construction during the outbreak of COVID-19 and other public health emergency are introduced. The advantages and future development of 3D printing construction are discussed as well. The practice shows that 3D printing construction has some obvious advantages for public application. Specifically, 3D printing technology enables the construction processes to be simplified, with shortened production period and convenient installation. The printing process is automatically controlled by the computer, with less manual intervention. The components are printed as unit modules that can be installed by a few labors. So far, this type of cabins has come into service in Nanjing, Xiongan, Haimen, Puzhou and other cities.
王香港,王申,贾鲁涛,等.3D打印混凝土技术在新冠肺炎防疫方舱中的应用[J].混凝土与水泥制品,2020(4):1-4,13. WANG X G,WANG S,JIA L T,et al.Application of 3D Printing Technology in Epidemic Prevention Cabins during the Outbreak of COVID-19[J].China Concrete and Cement Products,2020(4):1-4,13.

企业推荐

展会推荐

关闭 1

关注《混凝土与水泥制品》

总访问量 468,401   网站统计

官方微信公众号关闭
苏州混凝土水泥制品研究院有限公司

关于我们    |    联系我们    |    订购杂志    |    回到顶部

版权所有:中国混凝土与水泥制品网  苏ICP备10086386号   网站建设:中企动力 苏州

版权所有:中国混凝土与水泥制品网

苏ICP备10086386号

网站建设:中企动力 苏州